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Simplifying (4x + -1)(x + 2) = 4x Reorder the terms: (-1 + 4x)(x + 2) = 4x Reorder the terms: (-1 + 4x)(2 + x) = 4x Multiply (-1 + 4x) * (2 + x) (-1(2 + x) + 4x * (2 + x)) = 4x ((2 * -1 + x * -1) + 4x * (2 + x)) = 4x ((-2 + -1x) + 4x * (2 + x)) = 4x (-2 + -1x + (2 * 4x + x * 4x)) = 4x (-2 + -1x + (8x + 4x2)) = 4x Combine like terms: -1x + 8x = 7x (-2 + 7x + 4x2) = 4x Solving -2 + 7x + 4x2 = 4x Solving for variable 'x'. Reorder the terms: -2 + 7x + -4x + 4x2 = 4x + -4x Combine like terms: 7x + -4x = 3x -2 + 3x + 4x2 = 4x + -4x Combine like terms: 4x + -4x = 0 -2 + 3x + 4x2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -0.5 + 0.75x + x2 = 0 Move the constant term to the right: Add '0.5' to each side of the equation. -0.5 + 0.75x + 0.5 + x2 = 0 + 0.5 Reorder the terms: -0.5 + 0.5 + 0.75x + x2 = 0 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + 0.75x + x2 = 0 + 0.5 0.75x + x2 = 0 + 0.5 Combine like terms: 0 + 0.5 = 0.5 0.75x + x2 = 0.5 The x term is 0.75x. Take half its coefficient (0.375). Square it (0.140625) and add it to both sides. Add '0.140625' to each side of the equation. 0.75x + 0.140625 + x2 = 0.5 + 0.140625 Reorder the terms: 0.140625 + 0.75x + x2 = 0.5 + 0.140625 Combine like terms: 0.5 + 0.140625 = 0.640625 0.140625 + 0.75x + x2 = 0.640625 Factor a perfect square on the left side: (x + 0.375)(x + 0.375) = 0.640625 Calculate the square root of the right side: 0.80039053 Break this problem into two subproblems by setting (x + 0.375) equal to 0.80039053 and -0.80039053.Subproblem 1
x + 0.375 = 0.80039053 Simplifying x + 0.375 = 0.80039053 Reorder the terms: 0.375 + x = 0.80039053 Solving 0.375 + x = 0.80039053 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = 0.80039053 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = 0.80039053 + -0.375 x = 0.80039053 + -0.375 Combine like terms: 0.80039053 + -0.375 = 0.42539053 x = 0.42539053 Simplifying x = 0.42539053Subproblem 2
x + 0.375 = -0.80039053 Simplifying x + 0.375 = -0.80039053 Reorder the terms: 0.375 + x = -0.80039053 Solving 0.375 + x = -0.80039053 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = -0.80039053 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = -0.80039053 + -0.375 x = -0.80039053 + -0.375 Combine like terms: -0.80039053 + -0.375 = -1.17539053 x = -1.17539053 Simplifying x = -1.17539053Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.42539053, -1.17539053}
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